A military operation of Syrian troops in the town of Khan Sheikhoun does not violate any agreement, including agreements between Russia and Turkey on the formation of the de-escalation zone in Idlib, Russian Foreign Minister Sergey Lavrov said on Monday.

"Speaking about the situation in the de-escalation zone in Idlib, particularly in Khan Sheikhoun and in the surrounding areas, the Syrian armed forces, as supported by us, are not violating any agreement," TASS quoted Lavrov as saying.